Subject: Re: NetBSD system use characterization and scheduling
To: Erik E. Fair <>
From: Neil A. Carson <>
List: tech-kern
Date: 09/23/1998 00:51:11
Erik E. Fair wrote:

> There are more than enough applications that need guaranteed response time
> or guaranteed CPU slices that we ought to put in some minimal scheduling
> support for them. However, that doesn't mean we have to abandon the
> existing time-sharing scheduler - we just need to make the system scheduler
> a selectable module, depending upon the system behavior desired. That sort
> of architecture would also make it easier to experiment with different
> scheduling policies.

I've played with guaging respose times to delivered sigalarms, and found
the lack of kernel reentrancy to be the biggest issue of all rather than
the scheduler, for simple rate-monotonic tasks.


Neil A. Carson